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Entry  Fri Apr 8 01:05:45 2011, Suresh, Update, RF System, RF Source Harmonics RF_Source_Harmonics_Sheet1.pdf
    Reply  Fri Apr 22 09:05:53 2011, Suresh, Update, RF System, RF Source Harmonics 
       Reply  Fri Apr 22 10:28:22 2011, rana, Update, RF System, RF Source Harmonics 
          Reply  Wed May 4 15:39:32 2011, Suresh, Update, RF System, RF Source Harmonics RF_Harmonics_Sheet1.pdf
Message ID: 4557     Entry time: Fri Apr 22 09:05:53 2011     In reply to: 4503     Reply to this: 4559
Author: Suresh 
Type: Update 
Category: RF System 
Subject: RF Source Harmonics 
As seen in the previous measurement the first harmonic of both the 11 MHz and 55 MHz outputs are about 30dB
higher than desired.  In an attempt to attenuate these and higher harmonics I introduced SBP-10.7 filters into
the 11MHz outputs and SLP-50 filters into the 55 MHz outputs.
Then I measured the height of the harmonics again and found that they were suppressed as expected.  Now harmonic
at 22 MHz is 58dB lower than the 11 MHz fundamental.  And the 110 MHz is lower by 55 dB compared to the 55 MHz
fundamental.  None of the higher harmonics are seen => they are below 70dB

SLP-50 has an insertion loss(IL) of 4.65 dB and Return Loss(RL) of 3dB.  It would be better to use SBP-60
(IL=1.4 dB and RL=23dB)

The filter on the 11 MHz lines is okay. The SBP-10.7 has IL=0.6 dB and RL=23 dB.
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